Foggy perception slows us down

  1. Paolo Pretto  Is a corresponding author
  2. Jean-Pierre Bresciani
  3. Gregor Rainer
  4. Heinrich H Bülthoff  Is a corresponding author
  1. Max Planck Institute for Biological Cybernetics, Germany
  2. University Pierre Mendès-France and CNRS, France
  3. University of Fribourg, Switzerland
4 figures

Figures

Experimental design and time course of trials.

(A) Experiments 1 and 3: for each trial, the first scene was presented for 700 ms, which included a 100-ms fade-in phase at the beginning and a 100-ms fade-out phase at the end. The second scene was …

https://doi.org/10.7554/eLife.00031.003
Visibility conditions.

(A) Clear weather conditions (clear visibility): contrast is unaltered and the visibility is optimal in all directions (brown line). (B) Distance-independent contrast reduction (uniform contrast): …

https://doi.org/10.7554/eLife.00031.004
Opposite effects of distance-dependent and distance-independent contrast reduction. Experiments 1 and 2.

(A) Mean perceived driving speed across subjects as a function of visibility: for each subject, PSE values were averaged across the three target speeds (i.e., 40, 60, and 90 km/hr), then perceived …

https://doi.org/10.7554/eLife.00031.005
Opposite effects of fog and anti-fog. Experiments 3 and 4.

(A) Mean perceived driving speed across subjects as a function of visibility: Perceived speed was calculated from the measured PSEs using the following equation: Speedperceived = PSEclear + PSEclear

https://doi.org/10.7554/eLife.00031.006

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